How do I bill shop supplies and the disposal fee?

Most shops charge a flat shop-supplies / hazmat-disposal fee — typically $15-50 per work order, or a percentage of labor in some states. State regulation matters: California caps it; Florida treats it as taxable; Texas allows it as a flat fee. State the fee as its own line on the invoice and call it what it is — burying it in labor invites complaints, stating it openly almost never gets pushback.

What warranty should auto repair shops offer on parts and labor?

The industry standard is 12 months / 12,000 miles on parts and labor for most repairs (whichever comes first). For some parts the manufacturer covers longer (Bosch, Akebono, Bilstein often have 24-month warranties); pass that through. State both on the invoice — the invoice IS the warranty document for the customer.

When can I file a mechanic's lien against the vehicle?

Every state has a statutory mechanic's lien for unpaid auto repairs — typically allowing the shop to hold the vehicle until paid, and after a notice period (15-60 days depending on state), to sell the vehicle at auction to satisfy the bill. The invoice with a signed work-authorization is the foundation of the lien. Don't release a vehicle on credit unless you have a fleet contract or insurance authorization — payment terms on auto repair are Due on Receipt for a reason.

How do I handle fleet and insurance work differently from retail customers?

Fleet accounts (rental fleets, commercial vehicles, dealer subcontract) are billed Net 30 with a PO match — the PO comes from the fleet manager before work starts. Insurance work (collision repair, warranty claims) is billed to the insurance carrier per their authorization, often through a direct-bill system like Mitchell or CCC. Always confirm authorization (PO, claim #, deductible) in writing before starting the work — verbal authorization gets you stuck with the bill if the customer disputes.

How do I handle warranty returns and warranty claims on auto repair invoices?

Issue a credit memo (negative invoice) against the original invoice number when a warranty claim applies — don't modify the original invoice. The credit memo references the original invoice, the part SKU, and the warranty reason. If the part is covered by the manufacturer's warranty, track the warranty claim separately from the customer invoice so you can recover the cost from the supplier. For labor warranty (you redo work at no charge), document the redo on an internal work order but don't send the customer an invoice — a zero-dollar invoice can confuse AP systems.

Invoice Generator

Create professional invoices in minutes

ToolsFeedback

Details

Your Business

Client

Line Items

Review

Invoice Details

Set up your invoice information

Invoice Number *

Issue Date *

Due Date (Optional)

Currency *

Payment Terms

INVOICE

Invoice #: INV-001

From:

Apex Auto Service

Bill To:

Date: May 17, 2026

Terms: Due on Receipt

Description	Qty	Price	Total
Diagnostic — Engine code scan & inspection	1	$120.00	$120.00
Labor — Brake pad replacement (2 hrs @ $135)	2	$135.00	$270.00
Parts — Front brake pads (set)	1	$95.00	$95.00
Shop supplies & disposal fee	1	$18.00	$18.00

Subtotal:$503.00

Total:$503.00

INVOICE

Invoice #: INV-001

From:

Apex Auto Service

Bill To:

Date: May 17, 2026

Terms: Due on Receipt

Description	Qty	Price	Total
Diagnostic — Engine code scan & inspection	1	$120.00	$120.00
Labor — Brake pad replacement (2 hrs @ $135)	2	$135.00	$270.00
Parts — Front brake pads (set)	1	$95.00	$95.00
Shop supplies & disposal fee	1	$18.00	$18.00

Subtotal:$503.00

Total:$503.00

Overview

An auto repair invoice bills a customer for diagnostic work, labor, parts, and shop supplies on vehicle service. It tracks vehicle VIN, mileage, work performed by labor operation (using flat-rate hours or actual hours), parts at retail with markup, and the shop supplies / disposal fee — all the elements a customer or insurer needs for warranty and claim purposes.

Step-by-step

How to invoice as an auto repair shop

Record the vehicle: VIN, year/make/model, mileage in

The vehicle ID block at the top: VIN, year/make/model, current mileage, license plate. Insurers, manufacturers (for warranty work), and the customer's service history all need this. An invoice without the VIN is missing the most important identifier.

Start with the diagnostic fee

"Diagnostic — engine code scan & inspection — $120." Most shops charge a flat diagnostic that's credited toward repairs if the customer approves the work. State it as a line so the customer can see the math on the final bill.

List labor by operation, flat-rate or actual hours

"Labor — Brake pad replacement (2.0 hrs flat rate @ $135/hr) — $270." Use flat-rate hours from a labor guide (Mitchell, AllData) for standard operations; use actual hours only for diagnostic work or non-standard repairs. Either way, name the operation specifically.

Mark parts at retail with brand and warranty info

"Parts — Front brake pads, Akebono ceramic — $95." Listing brand sets expectations on quality and warranty length. Aftermarket vs. OEM is a price-difference customers care about; specify which.

Add the shop supplies / disposal fee

"Shop supplies & disposal fee — $18" is standard. Covers rags, cleaning solvents, used-oil disposal. State it as a line; states regulate this fee (some require it as a percentage, some as a fixed cap), and stating it transparently avoids customer disputes.

Set Due on Receipt — collect before vehicle leaves

Auto repair is almost always Due on Receipt — payment due before the customer takes the car. Mechanics liens enforce this in most states. For fleet accounts or insurance work, Net 30 with PO match.

What to include

What every auto repair invoice should include

Vehicle VIN, year/make/model, license plate, and mileage in

Customer name, contact, and (for fleet/insurance work) account number

Diagnostic fee as a separate line

Labor lines by operation, with flat-rate or actual hours and your shop rate

Parts with brand, OEM/aftermarket designation, and warranty period

Shop supplies / disposal fee per state regulation

Sales tax on parts (and labor in states that tax it)

Warranty terms on parts and labor (typically 12 months / 12,000 miles)

Any recommended additional work the customer declined (kept on file for next visit)

Signature line acknowledging the work was completed and the vehicle accepted

Watch out

Common auto repair invoicing mistakes

No VIN on the invoice. Warranty claims and insurance reimbursements both need it; missing VIN delays both.

Vague labor description like "engine repair." Use the labor operation name from the labor guide — payers want the specific operation, not the category.

No mileage in. Manufacturer warranty claims and time/mileage warranties both reference mileage at service time.

Forgetting the shop supplies / disposal fee. State regulations often allow it; not including it gives margin away.

Skipping the customer signature line. For higher-dollar repairs, a signed acknowledgment that the work was completed prevents chargebacks.

Common questions

Frequently asked questions.

Flat-rate for standard operations (brake jobs, oil changes, timing belts, alternator replacement) — that's the industry default and what labor guides exist to support. Actual hours for diagnostic work, customizations, and non-standard repairs where there's no published flat rate. Mixing both on one invoice is fine as long as you label each line: "(Flat rate)" or "(Actual hours)." Customers familiar with the industry expect flat-rate; explaining it isn't hard.

Why PrimeBase

Why auto shops move estimates + invoicing into PrimeBase

A clean PDF invoice closes one car. In PrimeBase, every vehicle owner lives in the CRM with their full service history, every estimate, every declined-work note, and every invoice on the same record. When the customer approves the estimate, the invoice is a one-click conversion — diagnostic, labor, parts pulled from inventory, shop supplies, and tax already carried over. Appointment booking handles drop-offs with conflict detection, and the customer sees the signed authorization and invoice in their branded portal.

Try PrimeBase free See PrimeBase for field services PrimeBase for field-service teams

✓ 14-day free trial · ✓ No credit card · ✓ Cancel anytime

Free auto repair invoice template. Parts, labor, done.

Invoice Generator

Invoice Details

INVOICE

From:

Bill To:

INVOICE

From:

Bill To:

How to invoice as an auto repair shop

What every auto repair invoice should include

Common auto repair invoicing mistakes

Frequently asked questions.

Why auto shops move estimates + invoicing into PrimeBase

Related tools and templates.